The winner of a Sumo bout is mainly determined by two rules: 1. The first person to touch the ground with any part of his person other than the soles of his feet loses. 2. The first person to touch the ground outside the ring loses.

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Sumo

Early UFC fights were less sport than spectacle, which led to accusations of brutality and "human cockfighting" by opponents. Political pressures eventually led the UFC into the underground, as pay-per-view providers nixed UFC programming, nearly extinguishing the UFC's public visibility.